- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
In rod or ball mill, replaceable ribs that project longitudinally from shell liners so as to act as lifters for crop load as mill rotates.
Industry:Mining
In rolling metals where all the force is transmitted through the rolls, maximum attainable angle between roll radius at the first contact and the roll centers. If the operating angle is less, it is called the contact angle or roll angle.
Industry:Mining
In rolling mills, the sections of larger diameter separating the grooves in rolls used for the production of rectangular sections.
Industry:Mining
In rotary drilling, a drill bit that is directly rotated by a turbine attached to the drill pipe at the bottom of the hole and driven by drilling mud pumped under high pressure. It was developed in the former U.S.S.R. for drilling deep oil wells.
Industry:Mining
In rotary kilns, special fire-clay shapes or rotary-kiln blocks so installed as to reduce the kiln diameter.
Industry:Mining
In salt mining, a vertical cut at each end of the room that permits the explosive to expand with the least resistance, thus promoting efficiency and power economy.
Industry:Mining
In salt production, a laborer who adjusts the height of the gate in the chute leading from the crusher by means of a lever, to regulate flow of crushed rock salt into vibrating screens that separate salt into various sizes prior to shipment or refining.
Industry:Mining
In salt production, one who tends operations of rotary driers through which crushed salt is run to drive off contained moisture prior to grinding, examining the salt discharged from the driers to see that evaporation of moisture is complete.
Industry:Mining
In sampling placer deposits, a caisson drill is driven by a combination of rotational impact and the weight of the drilling equipment.
Industry:Mining
In sandstone quarrying, a term used to describe the rock if it is massive, showing no open-bed seams. Compare: thin-bedded; thick-bedded.
Industry:Mining
